amd64/pure64-0.5.0/src/sysvar.asm

   1 ; =============================================================================
   2 ; Pure64 -- a 64-bit OS loader written in Assembly for x86-64 systems
   3 ; Copyright (C) 2008-2012 Return Infinity -- see LICENSE.TXT
   4 ;
   5 ; System Variables
   6 ; =============================================================================
   7
   8
   9 ;CONFIG
  10 cfg_smpinit:            db 1    ; By default SMP is enabled. Set to 0 to disable.
  11 cfg_vesa:               db 0    ; By default VESA is disabled. Set to 1 to enable.
  12 cfg_default:            db 0    ; By default we don't need a config file so set to 0. If a config file is found set to 1.
  13 cfg_e820:               db 1    ; By default E820 should be present. Pure64 will set this to 0 if not found/usable.
  14 cfg_mbr:                db 0    ; Did we boot off of a disk with a proper MBR
  15
  16 ; Memory locations
  17 E820Map:                equ 0x0000000000004000
  18 InfoMap:                equ 0x0000000000005000
  19 SystemVariables:        equ 0x0000000000005A00
  20 VBEModeInfoBlock        equ 0x0000000000005C00
  21 hdbuffer:               equ 0x0000000000070000  ; 32768 bytes = 0x6000 -> 0xDFFF VERIFY THIS!!!
  22 hdbuffer1:              equ 0x000000000007E000  ; 512 bytes = 0xE000 -> 0xE1FF VERIFY THIS!!!
  23
  24 ; DQ - Starting at offset 0, increments by 0x8
  25 os_ACPITableAddress:    equ SystemVariables + 0x00
  26 screen_cursor_offset:   equ SystemVariables + 0x08
  27 hd1_maxlba:             equ SystemVariables + 0x10
  28 os_Counter_Timer:       equ SystemVariables + 0x18
  29 os_Counter_RTC:         equ SystemVariables + 0x20
  30 os_LocalAPICAddress:    equ SystemVariables + 0x28
  31 os_IOAPICAddress:       equ SystemVariables + 0x30
  32
  33 ; DD - Starting at offset 128, increments by 4
  34 hd1_size:               equ SystemVariables + 128
  35 fat16_FatStart:         equ SystemVariables + 132
  36 fat16_TotalSectors:     equ SystemVariables + 136
  37 fat16_DataStart:        equ SystemVariables + 140
  38 fat16_RootStart:        equ SystemVariables + 144
  39 fat16_PartitionOffset:  equ SystemVariables + 148
  40 sata_base:              equ SystemVariables + 152
  41 os_BSP:                 equ SystemVariables + 156
  42
  43 ; DW - Starting at offset 256, increments by 2
  44 cpu_speed:              equ SystemVariables + 256
  45 cpu_activated:          equ SystemVariables + 258
  46 cpu_detected:           equ SystemVariables + 260
  47 mem_amount:             equ SystemVariables + 262
  48 fat16_BytesPerSector:   equ SystemVariables + 264
  49 fat16_ReservedSectors:  equ SystemVariables + 266
  50 fat16_SectorsPerFat:    equ SystemVariables + 268
  51 fat16_RootDirEnts:      equ SystemVariables + 270
  52 ata_base:               equ SystemVariables + 272
  53
  54 ; DB - Starting at offset 384, increments by 1
  55 hd1_enable:             equ SystemVariables + 384
  56 hd1_lba48:              equ SystemVariables + 385
  57 screen_cursor_x:        equ SystemVariables + 386
  58 screen_cursor_y:        equ SystemVariables + 387
  59 fat16_SectorsPerCluster:        equ SystemVariables + 388
  60 fat16_Fats:             equ SystemVariables + 389
  61 memtempstring:          equ SystemVariables + 390
  62 speedtempstring:        equ SystemVariables + 400
  63 cpu_amount_string:      equ SystemVariables + 410
  64 hdtempstring:           equ SystemVariables + 420
  65 os_key:                 equ SystemVariables + 421
  66 os_IOAPICCount:         equ SystemVariables + 424
  67
  68 ;MISC
  69 screen_cols:            db 80
  70 screen_rows:            db 25
  71 hextable:               db '0123456789ABCDEF'
  72
  73 ;STRINGS
  74 pure64:                 db 'Pure64 - ', 0
  75 kernelerror:            db 'ERROR: Software not found.', 0
  76 kernelname:             db 'KERNEL64SYS', 0
  77 configname:             db 'PURE64  CFG', 0
  78 msg_done:               db ' Done', 0
  79 msg_CPU:                db '[CPU: ', 0
  80 msg_mhz:                db 'MHz x', 0
  81 msg_MEM:                db ']  [MEM: ', 0
  82 msg_mb:                 db ' MiB]', 0
  83 msg_HDD:                db '  [HDD: ', 0
  84 msg_loadingkernel:      db 'Loading software', 0;...', 0
  85 msg_startingkernel:     db 'Starting software.', 0
  86 msg_noconfig:           db '(default config)', 0
  87 no64msg:                db 'ERROR: This computer does not support 64-Bit mode. Press any key to reboot.', 0
  88 initStartupMsg:         db 'Pure64 v0.5.0 - http://www.returninfinity.com', 13, 10, 13, 10, 'Initializing system... ', 0
  89 msg_date:               db '2011/12/19', 0
  90 hdd_setup_no_drive:     db 'No HDD detected', 0
  91 hdd_setup_read_error:   db 'Error reading HDD', 0
  92
  93 ; Mandatory information for all VBE revisions
  94 VBEModeInfoBlock.ModeAttributes         equ VBEModeInfoBlock + 0        ; DW - mode attributes
  95 VBEModeInfoBlock.WinAAttributes         equ VBEModeInfoBlock + 2        ; DB - window A attributes
  96 VBEModeInfoBlock.WinBAttributes         equ VBEModeInfoBlock + 3        ; DB - window B attributes
  97 VBEModeInfoBlock.WinGranularity         equ VBEModeInfoBlock + 4        ; DW - window granularity in KB
  98 VBEModeInfoBlock.WinSize                equ VBEModeInfoBlock + 6        ; DW - window size in KB
  99 VBEModeInfoBlock.WinASegment            equ VBEModeInfoBlock + 8        ; DW - window A start segment
 100 VBEModeInfoBlock.WinBSegment            equ VBEModeInfoBlock + 10       ; DW - window B start segment
 101 VBEModeInfoBlock.WinFuncPtr             equ VBEModeInfoBlock + 12       ; DD - real mode pointer to window function
 102 VBEModeInfoBlock.BytesPerScanLine       equ VBEModeInfoBlock + 16       ; DW - bytes per scan line
 103 ; Mandatory information for VBE 1.2 and above
 104 VBEModeInfoBlock.XResolution            equ VBEModeInfoBlock + 18       ; DW - horizontal resolution in pixels or characters
 105 VBEModeInfoBlock.YResolution            equ VBEModeInfoBlock + 20       ; DW - vertical resolution in pixels or characters
 106 VBEModeInfoBlock.XCharSize              equ VBEModeInfoBlock + 22       ; DB - character cell width in pixels
 107 VBEModeInfoBlock.YCharSize              equ VBEModeInfoBlock + 23       ; DB - character cell height in pixels
 108 VBEModeInfoBlock.NumberOfPlanes         equ VBEModeInfoBlock + 24       ; DB - number of memory planes
 109 VBEModeInfoBlock.BitsPerPixel           equ VBEModeInfoBlock + 25       ; DB - bits per pixel
 110 VBEModeInfoBlock.NumberOfBanks          equ VBEModeInfoBlock + 26       ; DB - number of banks
 111 VBEModeInfoBlock.MemoryModel            equ VBEModeInfoBlock + 27       ; DB - memory model type
 112 VBEModeInfoBlock.BankSize               equ VBEModeInfoBlock + 28       ; DB - bank size in KB
 113 VBEModeInfoBlock.NumberOfImagePages     equ VBEModeInfoBlock + 29       ; DB - number of image pages
 114 VBEModeInfoBlock.Reserved               equ VBEModeInfoBlock + 30       ; DB - reserved (0x00 for VBE 1.0-2.0, 0x01 for VBE 3.0)
 115 ; Direct Color fields (required for direct/6 and YUV/7 memory models)
 116 VBEModeInfoBlock.RedMaskSize            equ VBEModeInfoBlock + 31       ; DB - size of direct color red mask in bits
 117 VBEModeInfoBlock.RedFieldPosition       equ VBEModeInfoBlock + 32       ; DB - bit position of lsb of red mask
 118 VBEModeInfoBlock.GreenMaskSize          equ VBEModeInfoBlock + 33       ; DB - size of direct color green mask in bits
 119 VBEModeInfoBlock.GreenFieldPosition     equ VBEModeInfoBlock + 34       ; DB - bit position of lsb of green mask
 120 VBEModeInfoBlock.BlueMaskSize           equ VBEModeInfoBlock + 35       ; DB - size of direct color blue mask in bits
 121 VBEModeInfoBlock.BlueFieldPosition      equ VBEModeInfoBlock + 36       ; DB - bit position of lsb of blue mask
 122 VBEModeInfoBlock.RsvdMaskSize           equ VBEModeInfoBlock + 37       ; DB - size of direct color reserved mask in bits
 123 VBEModeInfoBlock.RsvdFieldPosition      equ VBEModeInfoBlock + 38       ; DB - bit position of lsb of reserved mask
 124 VBEModeInfoBlock.DirectColorModeInfo    equ VBEModeInfoBlock + 39       ; DB - direct color mode attributes
 125 ; Mandatory information for VBE 2.0 and above
 126 VBEModeInfoBlock.PhysBasePtr            equ VBEModeInfoBlock + 40       ; DD - physical address for flat memory frame buffer
 127 VBEModeInfoBlock.Reserved1              equ VBEModeInfoBlock + 44       ; DD - Reserved - always set to 0
 128 VBEModeInfoBlock.Reserved2              equ VBEModeInfoBlock + 48       ; DD - Reserved - always set to 0
 129 ; Mandatory information for VBE 3.0 and above
 130 ;VBEModeInfoBlock.LinBytesPerScanLine   dw 0    ; bytes per scan line for linear modes
 131 ;VBEModeInfoBlock.BnkNumberOfImagePages db 0    ; number of images for banked modes
 132 ;VBEModeInfoBlock.LinNumberOfImagePages db 0    ; number of images for linear modes
 133 ;VBEModeInfoBlock.LinRedMaskSize        db 0    ; size of direct color red mask (linear modes)
 134 ;VBEModeInfoBlock.LinRedFieldPosition   db 0    ; bit position of lsb of red mask (linear modes)
 135 ;VBEModeInfoBlock.LinGreenMaskSize      db 0    ; size of direct color green mask  (linear modes)
 136 ;VBEModeInfoBlock.LinGreenFieldPosition db 0    ; bit position of lsb of green mask (linear modes)
 137 ;VBEModeInfoBlock.LinBlueMaskSize       db 0    ; size of direct color blue mask  (linear modes)
 138 ;VBEModeInfoBlock.LinBlueFieldPosition  db 0    ; bit position of lsb of blue mask (linear modes)
 139 ;VBEModeInfoBlock.LinRsvdMaskSize       db 0    ; size of direct color reserved mask (linear modes)
 140 ;VBEModeInfoBlock.LinRsvdFieldPosition  db 0    ; bit position of lsb of reserved mask (linear modes)
 141 ;VBEModeInfoBlock.MaxPixelClock         dd 0    ; maximum pixel clock (in Hz) for graphics mode
 142
 143
 144 ; -----------------------------------------------------------------------------
 145 align 16
 146 GDTR64:                                 ; Global Descriptors Table Register
 147         dw gdt64_end - gdt64 - 1        ; limit of GDT (size minus one)
 148         dq 0x0000000000001000           ; linear address of GDT
 149
 150 gdt64:                                  ; This structure is copied to 0x0000000000001000
 151 SYS64_NULL_SEL equ $-gdt64              ; Null Segment
 152         dq 0x0000000000000000
 153 SYS64_CODE_SEL equ $-gdt64              ; Code segment, read/execute, nonconforming
 154         dq 0x0020980000000000           ; 0x00209A0000000000
 155 SYS64_DATA_SEL equ $-gdt64              ; Data segment, read/write, expand down
 156         dq 0x0000900000000000           ; 0x0020920000000000
 157 gdt64_end:
 158
 159 IDTR64:                                 ; Interrupt Descriptor Table Register
 160         dw 256*16-1                     ; limit of IDT (size minus one) (4096 bytes - 1)
 161         dq 0x0000000000000000           ; linear address of IDT
 162 ; -----------------------------------------------------------------------------
 163
 164
 165 ; =============================================================================
 166 ; EOF